Battery charger



FIG. 1 is a top front right perspective view of a battery charger, showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a perspective view thereof, shown in an environment of use; and,

FIG. 9 is an enlarged cross-sectional view along the line 9-9 of FIG. 2.

The broken lines represent environmental subject matter and parts of the article, none of which form part of the claim. 

CLAIM The ornamental design for a battery charger, as shown and described. 